LBPIDOPTERA OF THE DOTIKTNG DISTRICT. 157 



in 1762. Later, Enock has detailed the method of oviposition 

 (1900, Ent. Mo. Mag. p. 161, &c.). 



According to Roesel von Kosenhof, the eggs are simply 

 dropped to the bottom of the water, and hatch in about a fort- 

 night ; as, however, in Notonecta, this is probably due to the 

 fact that a female held in captivity could not find a suitable 

 place for deposition. In nature they are inserted in the stems 

 of Scirpus, or in the leaves of Potamogeton, only the filaments 

 being apparent. The ova are more elongate than those of Nepa, 

 and are terminated by but two filaments. They are figured by 

 Geoffroy and Dufour. According to Enock they are, like those 

 of other aquatic bugs, parasitized by the curious hymenopteron, 

 Prestwichia aquatica. According to Douglas, Ranatra winters as 

 a nymph. 



Ranatra linearis is rarer than Nepa, and apparently does not 

 occur north of the middle of England. 



(To be continued.) 



THE LEPIDOPTERA OF THE DORKING DISTRICT. 



By F. A. Oldaker, M.A. 



Having now left Dorking, after a residence there of seven 

 years, I think it may be of interest if I give a complete record 

 of my captures. Many of these have already appeared from 

 time to time in the ' Entomologist,' and my only apology 

 for repeating them is the additional value that may attach to a 

 consecutive account of my work. That work has, I fear, been 

 far from complete, for, owing to my business engagements, I 

 was unable to give the time and attention I should like to have 

 devoted to entomology, but I hope that such as it is the record 

 may be of interest and of some value. The dates attached to the 

 various species in their different stages are in every case the first 

 recorded in my diary. 



Pieris hrassiccB, P. rapcc, P. napi. Always abundant, and the larvfe 

 usually swarmed on nasturtiums in my garden. 



Enchloe cardamines. Common on Ranmore and in Polesden. Ova 

 found on AlUaria officinalis. Larvae pupated, July 6th. Very little 

 variation observed in the imagines, except as regards size. 



Colias edusa. Male taken in Dorking, September 13th, 1900. — C. 

 hjale. Two males taken in Holmwood, August 7th, 1901. 



Gonepteryx rhamni. Hybernated specimens common everywhere. 

 Ova and larvfe taken on Ranmore. Imago, July 25th. 



Aigijnnis euphrosyne. Common on Ranmore, 1903 (May 27th), 

 and in Polesden, 1901. Other years only seen singly. — A. adippe. A. 

 aglaia. Abundant on Ranmore in July, 1901, but none seen either 

 before or since. 



